警觉的用法和样例：
例句
-
飞行员必须警觉天气的变化。
A pilot must be awake to the changes in the weather. -
我对他说他父亲与我女儿有暖昧关系——这使他警觉了起来。
I told him about his father's affair with my daughter- that makes him sit up. -
我骂她惺惺作态，她马上警觉起来。
I called her a damned hypocrite and that made her sit up. -
每个人必须随时提高警觉。
One must be ever vigilant. -
警觉的豹子静悄悄地走近一只鹿。
The alert leopard went up to a deer quietly.
